body {
      padding-top: 50px;
    }
    .navbar{
      background: #222;
    }
    .navbar-header a{
      color: #9d9d9d;
    }
    
    .sidebar {
      display: none;
    }
    @media (min-width: 768px) {
      .sidebar {
        position: fixed;
        top: 51px;
        bottom: 0;
        left: 0;
        z-index: 1000;
        display: block;
        padding:20px 0px 0px 0px;
        overflow-x: hidden;
        overflow-y: auto; 
        background-color: #f5f5f5;
      }
    }
  .nav-sidebar {
     margin-bottom: 20px;
     display: none;
   }
   .nav-sidebar li {
     padding:10px 20px;
     
   }
   
   .nav-sidebar li:hover {
    background: #ddd;
    cursor: pointer;

   }
   /*当前二级菜单 active*/
   .nav-sidebar .active,.nav-sidebar .active:hover{
      background: #ddd;
   }
   .right{
      float: right;
   } 
   /*二级普通菜单字体颜色和样式*/
   .nav-items a{
    text-decoration: none;
    color: #4f5555;
   }
   /* 一级菜单样式 */
   .menu_level1{
     background: rgba(9, 96, 171, 0.81);/* #1B72BD */
     padding: 10px 20px;
     cursor: pointer;
     color: #ddd;
     margin:1px 0;

   }

   /*右边内容*/
   .sub-header{
    margin-top:20px;
   }

   /**用户按钮组*/
   .navbar-header button{
     background: none;
     color: #9d9d9d;
   }
   .navbar-header ul.dropdown-menu{
     text-align: center;
     background:#130c0e;
     position: absolute;
     right: 0;
   }
   
   .btns_a{
     width: 100%;
   }
   .btns_a:hover{
     background:#373a3c; 
   }

   .preview_pic img{
        width: 100px;
        height: 100px;
    }
    .preview_pic .sr_tb:hover{
         background: #A097DE;
    }
    .operator_td{
      text-align: center;
    }
    .operator_td button{
        margin: 10px;
    }

    /* 自定义 select 选项框样式 */
    select.custom{padding:5px;width: 20%;border-radius: 4px;border:1px solid #D1D8DC;display: inline-block;}